Bucket construction for turbines.



No. 764,451. I PATENTED JULY 5, 1904. H. GEISENHUNER. BUCKET CONSTRUCTION FOR TURBINBS.

APPLICATION FILED DEC. 19, 1908.

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UNITED STATES Patented July 5,1904.

PATENT OEETCE.

HENRY GEISENHONER, SCHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

BUCKET CONSTRUCTION FOR TURBINES.

SPECIFICATION forming part of Letters Patent No. 764,451, dated July 5, 1904.

Application filed December 19, 1903- Serial No. 185,784. (No model.)

To all whom, it may concern.-

Be it known that I, HENRY GmsnNHoNnR, a citizen of the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Bucket Construction for Turbines, of which the following is a specification.

The present invention relates to bucket construction, and more especially to the means employed to secure the covers in place, and has for its object to provide a simple and reliable construction and one of minimum cost.

In the accompanying drawings, which illustrate an embodiment of the invention, Figure 1 is a partial section of abucket-wheel, taken in the plane of rotation. Fig. 2 is a plan 'view of a part of the wheel, and Fig. 3 is an axial section taken on a plane passing between two buckets.

In carrying out the invention the buckets may be stationary or rotary, and inclosing the ends thereof is a cover which may be made in a single piece for certain constructions, or it may be made up of sections. Surrounding the cover is a retaining device or band of suitable oross-section, usually rectangular and placed edgewise. This edgewise arrangement of the band insures the maximum strength for a given cross-section of metal. The band may be made of one piece and wound around the cover one or more times and the ends secured, or it may be made of two or more complete turns each of which is made of segments. In the latter case it is desirable to have the joints between one pair of segments in a given turn break joint with those between another pair in the adjacentturn. The sections of the turns are then riveted or bolted together, the rivets or bolts extending axially. In order to hold the band and prevent it from buckling, whether it be made of one or several pieces it is desirable to provide means which engage with the sides thereof. A convenient and simple arrangement consists in forming tenons on the outer ends of some or all of the buckets, which extend through holes of corresponding size in the cover and engage with the band. The tenons right angles to the shaft.

may engage with one or both sides of the band, as desired. Where each tenon engages With only one side, it will be best to have the points of engagement alternate-that is to say, take place first on one side of the band and then on the other.

1 represents the support for the buckets 2, which may be made of any suitable metal, cast or otherwise, and of any desired form. The buckets may be integral or separate from the support. Formed integral with some or all of the buckets are tcnons 3, which contain a slot or groove 4 to receive the binding-band 5. Resting on the ends of the buckets is a cover 6, made of sheet-steel and divided into suitable lengths or sections. In the cover are holes that correspond in size and shape to and register with the tenons.

The binding-band may be of a single piece of flat ribbon or strip and given the proper shape by an edgewise-winding machine, or it may be composed of a number of steel punchings or laminations in the form of segments. The line of division between the laminae is at The inner edge of the band should be made a close lit with the cover and should also engage the tenons. The segments of the band are secured together by means of axially-extending bolts or rivets 7, and the ends 8 and 9 of the segments should. be arranged to break joint. Again, the abutting edges of the cover-sections should break joint with those of the band.

By removing the bolts or rivets 7 the binding-band and cover can be detached. This is advantageous where separable buckets are employed.

It is to be understood that the invention is not limited to any particular type of turbine. In accordance with the provisions of the patent statutes I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best embodiment thereof; but I desire to have it understood that the apparatus shown is merely illustrative and that the invention can be carried out by other means.

What I claim as new, and desire to secure by Letters Patent of the United States, is-

1. A turbine comprising buckets, a support therefor, and a cover for the buckets, in combination with a binding-band placed edgewise and engaging the cover.

2. A turbine comprising buckets, a support therefor, and a cover for the buckets, in combination With a binding-band applied edgewise to the cover, and means for preventing the band from buckling.

3. A turbine comprising buckets, a support therefor, and a cover for the buckets, in combination with a binding-band made up of laminations placed side by side.

4:. A turbine comprising buck'ets, a support therefor, and a cover for the buckets, in combination with a binding-band made up of laminations, and means for securing the laminations in place.

5. A turbine comprising buckets having tenons formed integral therewith, in combination with a bucket-cover having holes or openings registering With the tenons, and a binding-band which holds the cover in place.

6. A turbine comprising buckets having tenons, a support therefor, and a cover for the buckets having openings registering with the tenons, in combination with a binding-band applied edgewise to the cover which engages the tenons.

7 A turbine comprising buckets, a support therefor, and a cover for the buckets, in combination with a segmental binding-band for securing the cover in place.

8. A turbine comprising buckets, a support therefor, and a cover for the buckets, in combination with a segmental binding-band for securing the cover in place, the ends of the segments being arranged to break joint, and means for securing the several sections together.

9. An elastic-fluid turbine comprising buckets and their support, and a segmental cover for the buckets, in combination With a segmental binding-band for the cover, the ends of the cover-segments being arranged to break joint With those of the band.

10. In combination, a bucket-Wheel, acover for the buckets, and a laminated binding-band for securing the cover to the ends of the buckets, the line of division between the laminations being in a plane at right angles to the shaft.

In Witness whereof I have hereunto set my hand this 17th day of December, 1993.

HENRY GEISENHONER.

Witnesses:

BENJAMIN B. HULL, HELEN ORFORD. 

